A5108046733- Thermal properties of materials
- Graphene research and applications
- Thermal Radiation and Cooling Technologies
- Carbon Nanotubes in Composites
- Quantum Dots Synthesis And Properties
- Heat Transfer and Optimization
- Nanofluid Flow and Heat Transfer
- Advanced Thermoelectric Materials and Devices
- Semiconductor materials and devices
- Thermography and Photoacoustic Techniques
- Heat Transfer and Boiling Studies
- Nanowire Synthesis and Applications
- Advanced Electron Microscopy Techniques and Applications
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Memory and Neural Computing
- Luminescence Properties of Advanced Materials
- Copper Interconnects and Reliability
- Surface and Thin Film Phenomena
- Electronic Packaging and Soldering Technologies
- Laser Material Processing Techniques
- Photosynthetic Processes and Mechanisms
- Mass Spectrometry Techniques and Applications
- Composite Material Mechanics
- Electrocatalysts for Energy Conversion
- Semiconductor materials and interfaces
University of Chinese Academy of Sciences
2024
Beijing National Laboratory for Molecular Sciences
2021-2024
Chinese Academy of Sciences
2021-2024
Institute of Chemistry
2021-2024
Tsinghua University
2013-2023
Pacific Northwest National Laboratory
2016-2023
Xi'an Shiyou University
2020-2023
The University of Texas MD Anderson Cancer Center
2023
Jimei University
2022
National Engineering Research Center of Electromagnetic Radiation Control Materials
2021
α-Fe2O3 nanotubes that can be used as chemical sensors (see Figure) are fabricated by a novel carbon nanotube (CNT) templated synthesis. CNTs coated with continuous layer of Fe2O3 nanoparticles the decomposition Fe(NO3)3 in supercritical CO2/ethanol solution. Subsequent removal gives highly sensitive to H2S, which makes them attractive materials for chemiluminescent H2S sensors.
Abstract Thermal rectification is a fundamental phenomenon for active heat flow control. Significant thermal expected to exist in the asymmetric nanostructures, such as nanowires and thin films. As one-atom-thick membrane, graphene has attracted much attention realizing shown by many molecular dynamics simulations. Here, we experimentally demonstrate various monolayer nanostructures. A large factor of 26% achieved defect-engineered with nanopores on one side. 10% pristine nanoparticles...
Sr0.7Bi0.2TiO3 (SBT) is a promising pulse energy storage material due to minor hysteresis, but its low maximum polarization (Pmax) bad for storage. K+–Bi3+ defect pairs were introduced into the A-site of SBT obtain Sr0.35Bi0.35K0.25TiO3 (SBKT) with larger Pmax. Through first-principles calculations, we determined that introduction destroys paraelectric order phase and increases local polarization, resulting in more polar nanoregion (PNR) formation. On this basis, doping NaNbO3 (NN) A-...
This paper reports on measurements of the effective thermal conductivity and diffusivity various nanofluids using transient short-hot-wire technique. To remove influences static charge electrical conductance nanoparticles measurement accuracy, probes are carefully coated with a pure Al2O3 thin film only those that well used for measurements. In present study, conductivities diffusivities Au/toluene, Al2O3/water, carbon nanofiber (CNF)/water measured effects volume fraction temperature...
Abstract The fast development of single-particle cryogenic electron microscopy (cryo-EM) has made it more feasible to obtain the 3D structure well-behaved macromolecules with a molecular weight higher than 300 kDa at ~3 Å resolution. However, remains challenge high-resolution structures molecules smaller 200 using cryo-EM. In this work, we apply Cs-corrector-VPP-coupled cryo-EM study 52 streptavidin (SA) protein supported on thin layer graphene and embedded in vitreous ice. We are able solve...
The specific heat and thermal conductivity of graphene were comprehensively measured by an improved Raman method without pre-knowledge laser absorption.
Semiconductor nanowires (NWs) are a developing platform for electronic and photonic technologies, many demonstrated devices utilize p-type/n-type (p–n) junction encoded along either the axial or radial directions of wires. These miniaturized junctions enable diverse range functions, from sensors to solar cells, yet physics has not been thoroughly evaluated. Here, we present finite-element modeling Si NW p–n with total diameters ∼240 nm donor/acceptor doping levels ranging 1016 1020 cm–3. We...
Semiconductor nanowires (NWs) often exhibit efficient, broadband light absorption despite their relatively small size. This characteristic originates from the subwavelength dimensions and high refractive indices of NWs, which cause a light-trapping optical antenna effect. As result, NWs could enable high-efficiency but low-cost solar cells using volumes expensive semiconductor material. Nevertheless, extent to effect can be leveraged in devices will largely determine economic viability...
Single-particle cryo-electron microscopy (cryo-EM) has become one of the most essential tools to understand biological mechanisms at molecular level. A major bottleneck in cryo-EM technique is preparation good specimens that embed macromolecules a thin layer vitreous ice. In canonical specimen method, tend be adsorbed air–water interface, causing partial denaturation and/or preferential orientations. this work, we have designed and produced new type grids using bioactive-ligand...
This letter reports on the measurements of in-plane thermal conductivity and electrical a microfabricated, suspended, nanosized platinum thin film with width 260nm, thickness 28nm, length 5.3μm. The experimental results show that conductivity, resistance-temperature coefficient nanofilm are greatly lower than corresponding bulk values from 77to330K. comparison indicate relation between this might not follow Wiedemann–Franz law describes metallic material.
A tunable isotropic negative effective permeability is experimentally demonstrated in a three-dimensional (3D) dielectric composite consisting of ceramic cube arrays by temperature changing. It shows that strong subwavelength magnetic resonance can be excited cubes corresponding to the first Mie mode and continuously reversibly adjusted from 13.65to19.28GHz with changing −15to35°C. Accordingly, performed frequency range about 6GHz adjusting temperature. provides convenient route design...
Particle size is one important parameter of nanocrystals that need to be tightly controlled, owing its versatility for tailoring the properties and functions towards various applications. In this article, oxidative etching by hydrogen chloride employed as a tool control metallic nanocrystals. As result control, investigations into size-dependent plasmonic catalytic can investigated. Given shape kept consistent when tuning particle in system, it enables systematic investigation free influence...
Three-dimensional integration with through silicon vias offers a promising solution for future technology nodes. However, the heat accumulation and thermal strain may seriously affect performance, leakage, reliability of circuits. The cross-plane transport, generation, propagation coherent acoustic-phonon wave in thin Pt film-glass substrate have been comprehensively studied by applying picosecond laser pump–probe method different configurations. Significantly time-dependent reflectance...
Structure and rheological properties of myosin in myofibrillar protein (MP) after single frequency pulsed ultrasound (SFPU, G1-G2) dual (DFPU, G3) were compared for the first time. Results showed SFPU DFPU induced "stress response" through action cavitation on multiple myosin. In addition, there may be a certain quorum sensing among myosin, inducing more stable β-antiparallel structure to resist negative effects force. particle size synchronous fluorescence indicated that MPs changed stress....
A CuCo(O)-embedded nitrogen-enriched porous carbon framework catalyst derived from doped metal–organic frameworks for efficient hydrolysis of ammonia borane.
Mesoporous molecular sieves SBA-15, and MAS-7 MTS-9 synthesized from zeolite primary structure units, are characterized by high-resolution transmission electron microscopy (HRTEM). Direct observation of the micropores within these mesoporous materials via HRTEM is presented. And nanorange ordered microporosity found for first time pore walls MTS-9, which might be key to high hydrothermal stability materials.
Semiconductor nanowires (NWs) are often synthesized by the vapor–liquid–solid (VLS) mechanism, a process in which liquid droplet—supplied with precursors vapor phase—catalyzes growth of solid, crystalline NW. By changing supply precursors, NW composition can be altered as it grows to create axial heterostructures, applicable range technologies. The abruptness heterojunction is mediated catalyst, act reservoir material and impose lower limit on junction width. Here, we demonstrate that this...
Thermophysical characterization of graphene is very important for both fundamental and technological research. While most the existing thermal conductivity measurements are sheets with sizes larger than 1 μm, conductivities suspended submicron ribbons still few, although at scale predicted to be much smaller large strongly size dependent length width due 2D nature phonon transport. Here, we report temperature a 169-nm wide 846-nm long ribbon measured by electrical self-heating method. The...
The integration of ion mobility spectrometry (IMS) with mass (MS) and the ability to trap ions in IMS-MS measurements is great importance for performing reactions, accumulating ions, increasing analytical measurement sensitivity. development Structures Lossless Ion Manipulations (SLIM) offers potential manipulations an extended more effective manner, while opening opportunities many complex sequences manipulations. Here, we demonstrate separation trapping module a method based upon SLIM that...